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H
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CLA94 - The W3 IRS 5 Cluster: Radio Continuum and Water Maser Observations
Interferometry data
Short title
: Claussen et al. (1994)
Authors
: Claussen, M. J.Gaume, R. A.Johnston, K. J.Wilson, T. L.
Journal
: Astrophysical Journal Letters v.424, p.L41
Bibcode
:
1994ApJ...424L..41C
Target type
: HII,Continuum
Transitions
: H2O_22
Abstract
High sensitivity and angular resolution observations of the radio continuum toward W3 IRS 5, along with observations of strong water masers, have been made with the Very Large Array (VLA). At least seven distinct radio continuum sources have been discovered, which are most likely a cluster of B0.5-B0 stars with ionized stellar winds. This is in contrast to previous interpretations of observational data, which suggested that IRS 5 is a single massive protostar with bolometric luminosity of 2 x 10
5
solar luminosity. The spatial distribution of the water masers roughly follows that of the radio sources and these masers show a gradient in radial velocity similar to that found in a larger scale molecular outflow. We suggest that previously observed, multicomponent absorption in CO infrared transitions traces outflows from the several stellar wind sources, rather than episodic outbursts from a single source.
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Detection table from Claussen et al. (1994)
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individual components
ID
Obs. RA
Obs. Dec
RA offset
Dec offset
l
b
Group id
#
Source name
Image
Descr.
Line
V
range
F
peak
Telescope
Configuration
V
step
RMS
Beam
Detection
Class
Dist. (parallax)
Date
(J2000)
(J2000)
(mas)
(mas)
(deg.)
(deg.)
H
2
O
(km/s)
(mJy/beam)
(km/s)
(mJy/beam)
(arcsec)
Yes
/
No
(kpc)
1
+02 25 40.6702
+62 05 51.977
133.715015
1.21528
G133.715+1.215
W3 IRS 5 a
Image
Descr
22 GHz
;
-23.4;-56.3
2
NRAOVLA
A,B,C
0.33
0.320
0.7 x 0.6
+H
2
O
-CH
3
OH I
+CH
3
OH II
+OH
SFR
1989 January - September
+02 25 40.6702
+62 05 51.977
1.33247 mas
1.40174 mas
133.715015
1.215280
1
W3 IRS 5 a
2
2
+02 25 40.6911
+62 05 51.6461
133.715085
1.215209
G133.715+1.215
W3 IRS 5 b
22 GHz
;
-23.4;-56.3
2
NRAOVLA
A,B,C
0.33
0.320
0.7 x 0.6
+H
2
O
-CH
3
OH I
+CH
3
OH II
+OH
SFR
1989 January - September
+02 25 40.6911
+62 05 51.6461
1.18184 mas
1.70648 mas
133.715085
1.215209
1
W3 IRS 5 b
2
3
+02 25 40.7211
+62 05 52.5148
133.715054
1.215455
G133.715+1.215
W3 IRS 5 c
22 GHz
;
-23.4;-56.3
2.5
NRAOVLA
A,B,C
0.33
0.320
0.7 x 0.6
+H
2
O
-CH
3
OH I
+CH
3
OH II
+OH
SFR
1989 January - September
+02 25 40.7211
+62 05 52.5148
0.688142 mas
-0.755383 mas
133.715054
1.215455
1
W3 IRS 5 c
2.5
4
+02 25 40.7725
+62 05 52.5127
133.715148
1.21549
G133.715+1.215
W3 IRS 5 d1
22 GHz
;
-23.4;-56.3
2.5
NRAOVLA
A,B,C
0.33
0.320
0.7 x 0.6
+H
2
O
-CH
3
OH I
+CH
3
OH II
+OH
SFR
1989 January - September
+02 25 40.7725
+62 05 52.5127
0.948726 mas
0.654949 mas
133.715148
1.215490
1
W3 IRS 5 d1
2.5
5
+02 25 40.7947
+62 05 52.6317
133.715177
1.215536
G133.715+1.215
W3 IRS 5 d2
22 GHz
;
-23.4;-56.3
2.5
NRAOVLA
A,B,C
0.33
0.320
0.7 x 0.6
+H
2
O
-CH
3
OH I
+CH
3
OH II
+OH
SFR
1989 January - September
+02 25 40.7947
+62 05 52.6317
0.147474 mas
0.908071 mas
133.715177
1.215536
1
W3 IRS 5 d2
2.5
6
+02 25 40.8592
+62 05 53.829
133.715176
1.215892
G133.715+1.215
W3 IRS 5 e
22 GHz
;
-23.4;-56.3
1.4
NRAOVLA
A,B,C
0.33
0.320
0.7 x 0.6
+H
2
O
-CH
3
OH I
+CH
3
OH II
+OH
SFR
1989 January - September
+02 25 40.8592
+62 05 53.829
-0.690458 mas
-0.619954 mas
133.715176
1.215892
1
W3 IRS 5 e
1.4
7
+02 25 40.8679
+62 05 53.4086
133.715233
1.215789
G133.715+1.215
W3 IRS 5 f
22 GHz
;
-23.4;-56.3
1.4
NRAOVLA
A,B,C
0.33
0.320
0.7 x 0.6
+H
2
O
-CH
3
OH I
+CH
3
OH II
+OH
SFR
1989 January - September
+02 25 40.8679
+62 05 53.4086
0.259073 mas
0.201722 mas
133.715233
1.215789
1
W3 IRS 5 f
1.4
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select MAX(h2o_data_all.ra_hms) as ra_hms,MAX(h2o_data_all.dec_dms) as dec_dms,MAX(h2o_data_all.source_name) as source_name,MAX(h2o_data_all.ra) as ra,MAX(h2o_data_all.dec) as dec,MAX(h2o_data_all.l) as l,MAX(h2o_data_all.b) as b,MAX(h2o_data_all.grp) as grp,MAX(h2o_data_all.other_name) as other_name,MAX(h2o_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(h2o_data_all.line) as line,MAX(h2o_data_all.vrange) as vrange,MAX(h2o_data_all.vpeak) as vpeak,MAX(h2o_data_all.peak) as peak,MAX(h2o_data_all.fwhm) as fwhm,MAX(h2o_data_all.int) as int,MAX(h2o_data_all.rms) as rms,MAX(h2o_data_all.units) as units,MAX(h2o_data_all.units_rms) as units_rms,MAX(h2o_data_all.date_txt) as date_txt,MAX(h2o_data_all.telescope_ref) as telescope_ref,MAX(h2o_data_all.telescope_conf) as telescope_conf,MAX(h2o_data_all.v_step) as v_step,MAX(h2o_data_all.beam) as beam,MAX(h2o_data_all.beam_maj) as beam_maj,MAX(h2o_data_all.beam_min) as beam_min,MAX(h2o_data_all.beam_pa) as beam_pa,MAX(h2o_data_all.ref) as ref,MAX(h2o_data_all.list_ref) as list_ref,MAX(h2o_data_all.ascii) as ascii,MAX(h2o_data_all.url) as url,MAX(h2o_data_all.image) as image,MAX(h2o_data_all.image2) as image2,MAX(h2o_data_all.image3) as image3,MAX(h2o_data_all.descr) as descr,MAX(h2o_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(h2o_data_all.dist) as dist,1 as dist_parallax,MAX(h2o_data_all.date_txt) as date_txt,MAX(line_det) as line_det,MAX(type) as type,MAX(simbad_types_cat) as simbad_types_cat FROM h2o_data_all LEFT JOIN all_objects_withmet ON h2o_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' LEFT JOIN transitions ON h2o_data_all.line=transitions."Line" WHERE ref ilike 'CLA94' AND detected=true AND hide=false GROUP BY ref
select h2o_data_all.ra_hms,h2o_data_all.dec_dms,h2o_data_all.source_name,h2o_data_all.ra,h2o_data_all.dec,h2o_data_all.l,h2o_data_all.b,h2o_data_all.grp,h2o_data_all.other_name,h2o_data_all.other_desc,h2o_data_all.thermal,h2o_data_all.line,h2o_data_all.vrange,h2o_data_all.vpeak,h2o_data_all.peak,h2o_data_all.fwhm,h2o_data_all.int,h2o_data_all.rms,h2o_data_all.units,h2o_data_all.units_rms,h2o_data_all.date_txt,h2o_data_all.telescope_ref,h2o_data_all.telescope_conf,h2o_data_all.v_step,h2o_data_all.beam,h2o_data_all.beam_maj,h2o_data_all.beam_min,h2o_data_all.beam_pa,h2o_data_all.ref,h2o_data_all.list_ref,h2o_data_all.ascii,h2o_data_all.url,h2o_data_all.image,h2o_data_all.image2,h2o_data_all.image3,h2o_data_all.descr,h2o_data_all.id,h2o_data_all.mjy_flag,h2o_data_all.rms_mjy_flag,h2o_data_all.dist,h2o_data_all.dist_parallax,h2o_data_all.date_txt,line_det,type,simbad_types_cat FROM h2o_data_all LEFT JOIN all_objects_withmet ON h2o_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' LEFT JOIN transitions ON h2o_data_all.line=transitions."Line" WHERE ref ilike 'CLA94' AND detected=true AND hide=false ORDER BY detected DESC,id
